Per POLITICO's Ginger Gibson, who's traveling with Gingrich during his West Coast swing, the Gingrich campaign didn't inform the traveling press about the zoo trip; only San Diego Union-Tribune reporter Christopher Cadelago tagged along.

According to Cadelago, zoo staff shuttled Gingrich around to see various animals, including the feeding of a panda.

"Newt Gingrich's ringtone is ABBA's 'Dancing Queen,'" Cadelago tweeted during the trip, along with a photo of Gingrich and the panda (above). "Answers saying, 'I am standing here feeding a panda.'"